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<Title>Rectangular Angular Meters</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Rectangular Angular Meters</p>
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<div class="content">
<img src="images/rectangularmeter0.png" width='240' height='170'>&nbsp;&nbsp;<img src="images/rectangularmeter1.png" width='240' height='170'>&nbsp;&nbsp;<img src="images/rectangularmeter2.png" width='240' height='170'>&nbsp;&nbsp;<img src="images/rectangularmeter3.png" width='240' height='170'>&nbsp;&nbsp;<img src="images/rectangularmeter4.png" width='240' height='170'>&nbsp;&nbsp;<img src="images/rectangularmeter5.png" width='240' height='170'>
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This example demonstrates rectangular angular meters.<br><br>
The angular span of the meter scale in this example is from -60 to 60 degrees, which is one third of a circle. The meter is configured to have a rectangular frame with rounded corners. A semi-transparent rectangle is put at the bottom of the meter to create the object that covers the meter cap. The rectangle is created by using <a href="BaseChart.addText.htm">BaseChart.addText</a> to create an empty text box, and then use <a href="Box.setSize.htm">Box.setSize</a> and <a href="Box.setBackground.htm">Box.setBackground</a> to configure it to have the proper size and color.
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/rectangularmeter.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%!
// Function to create the demo charts
void createChart(WebChartViewer viewer, int chartIndex)
{
    // The value to display on the meter
    double value = 72.55;

    // Create an AngularMeter object of size 240 x 170 pixels with very light grey (0xeeeeee)
    // background, and a rounded 4-pixel thick light grey (0xcccccc) border
    AngularMeter m = new AngularMeter(240, 170, 0xeeeeee, 0xcccccc);
    m.setRoundedFrame(Chart.Transparent);
    m.setThickFrame(4);

    // Set the default text and line colors to dark grey (0x222222)
    m.setColor(Chart.TextColor, 0x222222);
    m.setColor(Chart.LineColor, 0x222222);

    // Center at (120, 145), scale radius = 128 pixels, scale angle -60 to +60 degrees
    m.setMeter(120, 145, 128, -60, 60);

    // Meter scale is 0 - 100, with major/minor/micro ticks every 20/10/5 units
    m.setScale(0, 100, 20, 10, 5);

    // Set the scale label style to 14pt Arial Italic. Set the major/minor/micro tick lengths to
    // 16/16/10 pixels pointing inwards, and their widths to 2/1/1 pixels.
    m.setLabelStyle("Arial Italic", 14);
    m.setTickLength(-16, -16, -10);
    m.setLineWidth(0, 2, 1, 1);

    // Demostrate different types of color scales and putting them at different positions
    double[] smoothColorScale = {0, 0x3333ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100,
        0xff0000};
    double[] stepColorScale = {0, 0x00cc00, 60, 0xffdd00, 80, 0xee0000, 100};
    double[] highLowColorScale = {0, 0x00ff00, 70, Chart.Transparent, 100, 0xff0000};

    if (chartIndex == 0) {
        // Add the smooth color scale at the default position
        m.addColorScale(smoothColorScale);
    } else if (chartIndex == 1) {
        // Add the smooth color scale starting at radius 128 with zero width and ending at radius
        // 128 with 16 pixels inner width
        m.addColorScale(smoothColorScale, 128, 0, 128, -16);
    } else if (chartIndex == 2) {
        // Add the smooth color scale starting at radius 70 with zero width and ending at radius 60
        // with 20 pixels outer width
        m.addColorScale(smoothColorScale, 70, 0, 60, 20);
    } else if (chartIndex == 3) {
        // Add the high/low color scale at the default position
        m.addColorScale(highLowColorScale);
    } else if (chartIndex == 4) {
        // Add the step color scale at the default position
        m.addColorScale(stepColorScale);
    } else {
        // Add the smooth color scale at radius 60 with 15 pixels outer width
        m.addColorScale(smoothColorScale, 60, 15);
    }

    // Add a text label centered at (120, 120) with 15pt Arial Italic font
    m.addText(120, 120, "CPU", "Arial Italic", 15, Chart.TextColor, Chart.BottomCenter);

    // Add a red (0xff0000) pointer at the specified value
    m.addPointer2(value, 0xff0000);

    // Add a semi-transparent light grey (0x3fcccccc) rectangle at (0, 120) and of size 240 x 60
    // pixels to cover the bottom part of the meter for decoration
    TextBox cover = m.addText(0, 120, "");
    cover.setSize(240, 60);
    cover.setBackground(0x3fcccccc);

    // Output the chart
    viewer.setChart(m, Chart.SVG);
}
%&gt;
&lt;%
// This example includes 6 charts
WebChartViewer[] viewers = new WebChartViewer[6];
for (int i = 0; i &lt; viewers.length; ++i) {
    viewers[i] = new WebChartViewer(request, "chart" + i);
    createChart(viewers[i], i);
}
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Rectangular Angular Meters&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Rectangular Angular Meters
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here are the chart images ****** --&gt;
    &lt;%
        for (int i = 0; i &lt; viewers.length; ++i) {
            out.write(viewers[i].renderHTML(response));
            out.write(" ");
        }
    %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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